What is the meaning of the top line as the essential elements of four lines

The essential elements of a four-line topology refer to the basic elements of poetry, an ancient Chinese literary genre. In ancient poetry, there are four lines in a poem, with five characters in each line, which is called the "four lines in the top frame". Essential elements refer to the basic elements of poetry, that is, what must be included in the creation of a poem. According to the ancient literati, a good poem must have the following four elements:

1. Theme: the poem must have a clear theme or content, which can be describing the natural landscape, expressing feelings, eulogizing heroes, discussing society and so on.

2. Rhetoric: Poetry is a kind of language art, the use of rhetorical devices can increase the expressive power of poetry, such as metaphor, hyperbole, and so on.

3. Rhyme: Ancient poetry is characterized by the rhyme scheme, and the rhythms of the verses need to conform to certain rules, which can increase the musicality of the poem.

4. Emotion: Poetry is a form of art that expresses emotion, and the author should be able to express real feelings in his creation, so that the reader can have ****ing feelings.

The above four elements constitute the basic framework of ancient poetry, as well as the criteria for evaluating a poem. They *** together constitute the beauty and artistic characteristics of ancient poetry.